bulk upload of source

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/open_tmpfd.c b/lib/open_tmpfd.c
new file mode 100644
index 0000000..e94bf32
--- /dev/null
+++ b/lib/open_tmpfd.c
@@ -0,0 +1,18 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "../ninitfeatures.h"
+
+int open_tmpfd(char *target, char *tmp, int mode) /*EXTRACT_INCL*/ {
+  unsigned long len;
+  char *x;
+  int fd;
+  for (len=0 ;; len++) {
+    x = tmp + str_copy(tmp, target);
+    if (len) x += fmt_ulong(x,len);
+    x[0] = '~'; x[1] = 0;
+    fd = open(tmp, O_WRONLY|O_CREAT|O_EXCL, mode);
+    if (fd >=0 || errno != EEXIST) break;
+  }
+  return fd;
+}